Lie elements and the matrix-tree theorem
Combinatorics
2020-11-23 v1 Representation Theory
Abstract
For a finite-dimensional representation V of a group G we introduce and study the notion of a Lie element in the group algebra k[G]. The set L(V) \subset k[G] of Lie elements is a Lie algebra and a G-module acting on the original representation V. Lie elements often exhibit nice combinatorial properties. Thus, for G = S_n and V, a permutation representation, we prove a formula for the characteristic polynomial of a Lie element similar to the classical matrix-tree theorem.
Cite
@article{arxiv.2011.10340,
title = {Lie elements and the matrix-tree theorem},
author = {Yurii Burman and Valeriy Kulishov},
journal= {arXiv preprint arXiv:2011.10340},
year = {2020}
}